[thirdparty/glibc.git] / nptl / sysdeps / x86_64 / x32 / tls.h

/* Definition for thread-local data handling.  nptl/x32 version.
   Copyright (C) 2012-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _X32_TLS_H
#define _X32_TLS_H	1

#include <sysdeps/x86_64/tls.h>

#ifndef __ASSEMBLER__

/* X32 doesn't support 32-bit indirect calls via memory.  Instead, we
   load the 32-bit address from memory into the lower 32 bits of the
   return-value register, which will automatically zero-extend the upper
   32 bits of the return-value register.  We then do the indirect call
   via the 64-bit return-value register.  */
# undef CALL_THREAD_FCT
# define CALL_THREAD_FCT(descr) \
  ({ void *__res;							      \
     asm volatile ("movl %%fs:%P2, %%edi\n\t"				      \
		   "movl %%fs:%P1, %k0\n\t"				      \
		   "callq *%q0"						      \
		   : "=a" (__res)					      \
		   : "i" (offsetof (struct pthread, start_routine)),	      \
		     "i" (offsetof (struct pthread, arg))		      \
		   : "di", "si", "cx", "dx", "r8", "r9", "r10", "r11",	      \
		     "memory", "cc");					      \
     __res; })

#endif /* __ASSEMBLER__ */

#endif	/* x32/tls.h */
Commit	Line	Data
60d45b36	1	/* Definition for thread-local data handling. nptl/x32 version.
d4697bc9	2	Copyright (C) 2012-2014 Free Software Foundation, Inc.
60d45b36 L	3	This file is part of the GNU C Library.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
	16	License along with the GNU C Library; if not, see
	17	<http://www.gnu.org/licenses/>. */
	18
	19	#ifndef _X32_TLS_H
	20	#define _X32_TLS_H 1
	21
	22	#include <sysdeps/x86_64/tls.h>
	23
	24	#ifndef __ASSEMBLER__
	25
d3c66004 L	26	/* X32 doesn't support 32-bit indirect calls via memory. Instead, we
	27	load the 32-bit address from memory into the lower 32 bits of the
	28	return-value register, which will automatically zero-extend the upper
	29	32 bits of the return-value register. We then do the indirect call
	30	via the 64-bit return-value register. */
60d45b36 L	31	# undef CALL_THREAD_FCT
	32	# define CALL_THREAD_FCT(descr) \
	33	({ void *__res; \
	34	asm volatile ("movl %%fs:%P2, %%edi\n\t" \
	35	"movl %%fs:%P1, %k0\n\t" \
	36	"callq *%q0" \
	37	: "=a" (__res) \
	38	: "i" (offsetof (struct pthread, start_routine)), \
	39	"i" (offsetof (struct pthread, arg)) \
	40	: "di", "si", "cx", "dx", "r8", "r9", "r10", "r11", \
	41	"memory", "cc"); \
	42	__res; })
	43
	44	#endif /* __ASSEMBLER__ */
	45
	46	#endif /* x32/tls.h */